Resistance Mechanism to Fulvia fulva of Tomato Transformed with GO Gene

【Objective】 The aim of the study is to determine the mechanism of resistance to Fulvia fulva of tomato transformed with GO gene.【Method】Superoxidase (SOD), peroxidase (POD), catalase (CAT), phenylalanine ammonialyase (PAL) and polyphenoloxidase (PPO) activities of three transgenic tomato lines and non-transgenic line (CK) were studied after inoculation. 【Result】The results showed that SOD, POD, CAT activities of transgenic tomato lines were much higher than that of non-transgenic tomato and showed a peak earlier than that of non-transgenic tomato line. Moreover the activities of PAL and PPO increased and showed two peaks in three transgenic tomato lines and only one peak in non-transgenic tomato line. 【Conclusion】T1 tomato plants infected with Fulvia fulva showed enhanced disease resistance, delayed disease symptoms and reduced leaf lesions at different levels.